Zoroastrism vs Judaism

Tweet

A lot of people, like my history teacher(who might not know much about religions), are quick to say judaism is the oldest monotheistic religion (apart from that Amenhotep sun-worship thing, as it didnt last). Which would be more correct?But really, i think Zoroastrism has influenced Judaism more than vice versa. Especially, some christian things appear more associated with Z. than J. (eg Satan vs Jehova) What do you think?